This is what was inside. Seems like a piece of glue or something. No big deal. Probably got knocked off during transport. I ordered this other key, but I doubt it's the right one. It doesn't look like it matches exactly. Anyway, we shall see when it comes in. If it works, I'm getting in! I'm also missing 3 out of 4 slip pads. I emailed Jack to buy some more. Hopefully I can. If anyone is not using theirs, I'll buy them. I'll do some comparisons with the Mjolnir and the WA6 tomorrow. I'll try the LCD-X, HD650 and K701 on it.